Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 302, Issue -, Pages 105-113Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2015.09.036
Keywords
Iron modification; Adsorption; Visible light photo-Fenton; Regeneration; Circumneutral pH
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Funding
- Natural Science Foundation of Hubei Province, China [2012FFA089]
- Large-scale Instrument and Equipment Sharing Foundation of Wuhan University
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Iron modified bentonite (FeMB) was prepared and used as an inexpensive adsorbent to rapidly remove organic pollutant (Rhodamine B, RhB) from aqueous solution. The iron modification significantly improved the adsorption performance of FeMB for RhB and permitted an easy separation of FeMB from the treated effluent. The equilibrium adsorption studies indicated that the dye molecules obeyed Langmuir type of adsorption with the calculated maximum adsorption capacity of 168.13 mg g(-1) for FeMB. The heterogeneous photo-Fenton process operated at circumneutral pH in the presence of visible light irradiation was found to be effective for the regeneration of the spent FeMB. Furthermore, the regeneration efficiency of as high as 79% was still achieved after 5 consecutive adsorption-regeneration cycles. Considering that, the visible light photo-Fenton approach could be applied as an excellent alternative for regenerating clay-based adsorbents by avoiding the use of dissolved iron salts. (C) 2015 Elsevier B.V. All rights reserved.
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